There are so many exercises you can do that will help you dance better. Build your core strength using any exercises you find that you will do regulary. Friends have taught me a few yoga positions that really help, and I find that doing one-legged squats helps a lot. There is so much you can do, and it will make you feel better over time, as well. There had been some videos on Youtube of Marcus and Karen Hilton demonstrating exercises to build strength for smooth dances in particular, but they seem to have been removed due to copywright issues. They were excellent, but you need the visual of those.Best of luck.